Answer:
The correct option is D. chemical energy
Step-by-step explanation:
Cellular respiration can be described as a chemical reaction by which ATP is synthesized.
Sugar in the form of glucose and oxygen combine by this process to release water and carbon dioxide. ATP is generated by this chemical reaction which is an energy fuel. The ATP formed as a result of cellular respiration is used by the cells to carry out their normal functions. Hence, option D is the correct answer.